git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl_still.c

   1 /*
   2  * consumer_sdl_still.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_syswm.h>
  32 #include <sys/time.h>
  33
  34 /** This classes definition.
  35 */
  36
  37 typedef struct consumer_sdl_s *consumer_sdl;
  38
  39 struct consumer_sdl_s
  40 {
  41         struct mlt_consumer_s parent;
  42         mlt_properties properties;
  43         pthread_t thread;
  44         int joined;
  45         int running;
  46         int window_width;
  47         int window_height;
  48         int width;
  49         int height;
  50         int playing;
  51         int sdl_flags;
  52         SDL_Surface *sdl_screen;
  53         SDL_Rect rect;
  54         uint8_t *buffer;
  55         int last_position;
  56         mlt_producer last_producer;
  57         int filtered;
  58 };
  59
  60 /** Forward references to static functions.
  61 */
  62
  63 static int consumer_start( mlt_consumer parent );
  64 static int consumer_stop( mlt_consumer parent );
  65 static int consumer_is_stopped( mlt_consumer parent );
  66 static void consumer_close( mlt_consumer parent );
  67 static void *consumer_thread( void * );
  68 static int consumer_get_dimensions( int *width, int *height );
  69 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
  70
  71 /** This is what will be called by the factory - anything can be passed in
  72         via the argument, but keep it simple.
  73 */
  74
  75 mlt_consumer consumer_sdl_still_init( char *arg )
  76 {
  77         // Create the consumer object
  78         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  79
  80         // If no malloc'd and consumer init ok
  81         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  82         {
  83                 // Get the parent consumer object
  84                 mlt_consumer parent = &this->parent;
  85
  86                 // get a handle on properties
  87                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
  88                 this->properties = MLT_SERVICE_PROPERTIES( service );
  89
  90                 // Get the default display ratio
  91                 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
  92
  93                 // We have stuff to clean up, so override the close method
  94                 parent->close = consumer_close;
  95
  96                 // Default scaler (for now we'll use nearest)
  97                 mlt_properties_set( this->properties, "rescale", "nearest" );
  98
  99                 // We're always going to run this in non-realtime mode
 100                 mlt_properties_set( this->properties, "real_time", "0" );
 101
 102                 // Default progressive true
 103                 mlt_properties_set_int( this->properties, "progressive", 1 );
 104
 105                 // Ensure we don't join on a non-running object
 106                 this->joined = 1;
 107
 108                 // process actual param
 109                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 110                 {
 111                         this->width = mlt_properties_get_int( this->properties, "width" );
 112                         this->height = mlt_properties_get_int( this->properties, "height" );
 113                 }
 114
 115                 // Default window size
 116                 this->window_width = ( double )this->height * display_ratio;
 117                 this->window_height = this->height;
 118
 119                 // Set the sdl flags
 120                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 121
 122                 // Allow thread to be started/stopped
 123                 parent->start = consumer_start;
 124                 parent->stop = consumer_stop;
 125                 parent->is_stopped = consumer_is_stopped;
 126
 127                 // Register specific events
 128                 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 129
 130                 // Return the consumer produced
 131                 return parent;
 132         }
 133
 134         // malloc or consumer init failed
 135         free( this );
 136
 137         // Indicate failure
 138         return NULL;
 139 }
 140
 141 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
 142 {
 143         if ( listener != NULL )
 144                 listener( owner, this, ( SDL_Event * )args[ 0 ] );
 145 }
 146
 147 static int consumer_start( mlt_consumer parent )
 148 {
 149         consumer_sdl this = parent->child;
 150
 151         if ( !this->running )
 152         {
 153                 // Attach a colour space converter
 154                 if ( !this->filtered )
 155                 {
 156                         mlt_filter filter = mlt_factory_filter( "avcolour_space", NULL );
 157                         mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
 158                         mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
 159                         mlt_filter_close( filter );
 160                         this->filtered = 1;
 161                 }
 162
 163                 consumer_stop( parent );
 164
 165                 this->last_position = -1;
 166                 this->running = 1;
 167                 this->joined = 0;
 168
 169                 // Allow the user to force resizing to window size
 170                 if ( mlt_properties_get_int( this->properties, "resize" ) )
 171                 {
 172                         mlt_properties_set_int( this->properties, "width", this->width );
 173                         mlt_properties_set_int( this->properties, "height", this->height );
 174                 }
 175
 176                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 177                 {
 178                         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 179                         {
 180                                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 181                                 return -1;
 182                         }
 183
 184                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 185                         SDL_EnableUNICODE( 1 );
 186                 }
 187                 else
 188                 {
 189                         if ( SDL_GetVideoSurface( ) != NULL )
 190                         {
 191                                 this->sdl_screen = SDL_GetVideoSurface( );
 192                                 consumer_get_dimensions( &this->window_width, &this->window_height );
 193                         }
 194                 }
 195
 196                 if ( this->sdl_screen == NULL )
 197                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 198
 199                 pthread_create( &this->thread, NULL, consumer_thread, this );
 200         }
 201
 202         return 0;
 203 }
 204
 205 static int consumer_stop( mlt_consumer parent )
 206 {
 207         // Get the actual object
 208         consumer_sdl this = parent->child;
 209
 210         if ( this->joined == 0 )
 211         {
 212                 // Kill the thread and clean up
 213                 this->running = 0;
 214
 215                 pthread_join( this->thread, NULL );
 216                 this->joined = 1;
 217
 218                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 219                         SDL_Quit( );
 220
 221                 this->sdl_screen = NULL;
 222         }
 223
 224         return 0;
 225 }
 226
 227 static int consumer_is_stopped( mlt_consumer parent )
 228 {
 229         consumer_sdl this = parent->child;
 230         return !this->running;
 231 }
 232
 233 static int sdl_lock_display( )
 234 {
 235         SDL_Surface *screen = SDL_GetVideoSurface( );
 236         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 237 }
 238
 239 static void sdl_unlock_display( )
 240 {
 241         SDL_Surface *screen = SDL_GetVideoSurface( );
 242         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 243                 SDL_UnlockSurface( screen );
 244 }
 245
 246 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 247 {
 248         // Generate the affine transform scaling values
 249         int scale_width = ( width << 16 ) / rect.w;
 250         int scale_height = ( height << 16 ) / rect.h;
 251         int stride = width * 3;
 252         int x, y, row_index;
 253         uint8_t *q, *row;
 254
 255         // Constants defined for clarity and optimisation
 256         int scanlength = screen->pitch;
 257         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 258         uint8_t *p;
 259
 260         // Iterate through the screen using a very basic scaling algorithm
 261         for ( y = 0; y < rect.h; y ++ )
 262         {
 263                 p = start;
 264                 row_index = ( scale_height * y ) >> 16;
 265                 row = image + stride * row_index;
 266                 for ( x = 0; x < rect.w; x ++ )
 267                 {
 268                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 269                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 270                 }
 271                 start += scanlength;
 272         }
 273 }
 274
 275 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 276 {
 277         // Generate the affine transform scaling values
 278         int scale_width = ( width << 16 ) / rect.w;
 279         int scale_height = ( height << 16 ) / rect.h;
 280         int stride = width * 3;
 281         int x, y, row_index;
 282         uint8_t *q, *row;
 283
 284         // Constants defined for clarity and optimisation
 285         int scanlength = screen->pitch / 2;
 286         uint16_t *start = ( uint16_t * )screen->pixels + rect.y * scanlength + rect.x;
 287         uint16_t *p;
 288
 289         // Iterate through the screen using a very basic scaling algorithm
 290         for ( y = 0; y < rect.h; y ++ )
 291         {
 292                 p = start;
 293                 row_index = ( scale_height * y ) >> 16;
 294                 row = image + stride * row_index;
 295                 for ( x = 0; x < rect.w; x ++ )
 296                 {
 297                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 298                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 299                 }
 300                 start += scanlength;
 301         }
 302 }
 303
 304 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 305 {
 306         // Generate the affine transform scaling values
 307         int scale_width = ( width << 16 ) / rect.w;
 308         int scale_height = ( height << 16 ) / rect.h;
 309         int stride = width * 3;
 310         int x, y, row_index;
 311         uint8_t *q, *row;
 312
 313         // Constants defined for clarity and optimisation
 314         int scanlength = screen->pitch;
 315         uint8_t *start = ( uint8_t * )screen->pixels + rect.y * scanlength + rect.x;
 316         uint8_t *p;
 317         uint32_t pixel;
 318
 319         // Iterate through the screen using a very basic scaling algorithm
 320         for ( y = 0; y < rect.h; y ++ )
 321         {
 322                 p = start;
 323                 row_index = ( scale_height * y ) >> 16;
 324                 row = image + stride * row_index;
 325                 for ( x = 0; x < rect.w; x ++ )
 326                 {
 327                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 328                         pixel = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 329                         *p ++ = (pixel & 0xFF0000) >> 16;
 330                         *p ++ = (pixel & 0x00FF00) >> 8;
 331                         *p ++ = (pixel & 0x0000FF);
 332                 }
 333                 start += scanlength;
 334         }
 335 }
 336
 337 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 338 {
 339         // Generate the affine transform scaling values
 340         int scale_width = ( width << 16 ) / rect.w;
 341         int scale_height = ( height << 16 ) / rect.h;
 342         int stride = width * 3;
 343         int x, y, row_index;
 344         uint8_t *q, *row;
 345
 346         // Constants defined for clarity and optimisation
 347         int scanlength = screen->pitch / 4;
 348         uint32_t *start = ( uint32_t * )screen->pixels + rect.y * scanlength + rect.x;
 349         uint32_t *p;
 350
 351         // Iterate through the screen using a very basic scaling algorithm
 352         for ( y = 0; y < rect.h; y ++ )
 353         {
 354                 p = start;
 355                 row_index = ( scale_height * y ) >> 16;
 356                 row = image + stride * row_index;
 357                 for ( x = 0; x < rect.w; x ++ )
 358                 {
 359                         q = row + ( ( ( scale_width * x ) >> 16 ) * 3 );
 360                         *p ++ = SDL_MapRGB( screen->format, *q, *( q + 1 ), *( q + 2 ) );
 361                 }
 362                 start += scanlength;
 363         }
 364 }
 365
 366 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 367 {
 368         // Get the properties of this consumer
 369         mlt_properties properties = this->properties;
 370
 371         mlt_image_format vfmt = mlt_image_rgb24;
 372         int height = this->height;
 373         int width = this->width;
 374         uint8_t *image = NULL;
 375         int changed = 0;
 376         double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
 377
 378         void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 379         void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 380
 381         if ( lock != NULL ) lock( );
 382
 383         sdl_lock_display();
 384
 385         // Handle events
 386         if ( this->sdl_screen != NULL )
 387         {
 388                 SDL_Event event;
 389
 390                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 391
 392                 while ( SDL_PollEvent( &event ) )
 393                 {
 394                         mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
 395
 396                         switch( event.type )
 397                         {
 398                                 case SDL_VIDEORESIZE:
 399                                         this->window_width = event.resize.w;
 400                                         this->window_height = event.resize.h;
 401                                         changed = 1;
 402                                         break;
 403                                 case SDL_QUIT:
 404                                         this->running = 0;
 405                                         break;
 406                                 case SDL_KEYDOWN:
 407                                         {
 408                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 409                                                 char keyboard[ 2 ] = " ";
 410                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 411                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 412                                                 {
 413                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 414                                                         callback( producer, keyboard );
 415                                                 }
 416                                         }
 417                                         break;
 418                         }
 419                 }
 420         }
 421
 422         if ( this->sdl_screen == NULL || changed )
 423         {
 424                 // open SDL window
 425                 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 426                 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
 427                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 428                 changed = 1;
 429         }
 430         else
 431         {
 432                 changed = 1;
 433         }
 434
 435         if ( changed == 0 &&
 436                  this->last_position == mlt_frame_get_position( frame ) &&
 437                  this->last_producer == mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL ) )
 438         {
 439                 sdl_unlock_display( );
 440                 if ( unlock != NULL )
 441                         unlock( );
 442                 return 0;
 443         }
 444
 445         // Update last frame shown info
 446         this->last_position = mlt_frame_get_position( frame );
 447         this->last_producer = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "_producer", NULL );
 448
 449         // Get the image, width and height
 450         mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 451         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 452
 453         if ( image != NULL )
 454         {
 455                 char *rescale = mlt_properties_get( properties, "rescale" );
 456                 if ( rescale != NULL && strcmp( rescale, "none" ) )
 457                 {
 458                         double this_aspect = display_ratio / ( ( double )this->window_width / ( double )this->window_height );
 459                         this->rect.w = this_aspect * this->window_width;
 460                         this->rect.h = this->window_height;
 461                         if ( this->rect.w > this->window_width )
 462                         {
 463                                 this->rect.w = this->window_width;
 464                                 this->rect.h = ( 1.0 / this_aspect ) * this->window_height;
 465                         }
 466                 }
 467                 else
 468                 {
 469                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 470                         this->rect.w = frame_aspect * this->window_height;
 471                         this->rect.h = this->window_height;
 472                         if ( this->rect.w > this->window_width )
 473                         {
 474                                 this->rect.w = this->window_width;
 475                                 this->rect.h = ( 1.0 / frame_aspect ) * this->window_width;
 476                         }
 477                 }
 478
 479                 this->rect.x = ( this->window_width - this->rect.w ) / 2;
 480                 this->rect.y = ( this->window_height - this->rect.h ) / 2;
 481
 482                 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
 483                 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
 484                 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
 485                 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 486         }
 487
 488         if ( !mlt_consumer_is_stopped( &this->parent ) && SDL_GetVideoSurface( ) != NULL && this->sdl_screen != NULL && this->sdl_screen->pixels != NULL )
 489         {
 490                 memset( this->sdl_screen->pixels, 0, this->window_width * this->window_height * this->sdl_screen->format->BytesPerPixel );
 491
 492                 switch( this->sdl_screen->format->BytesPerPixel )
 493                 {
 494                         case 1:
 495                                 display_1( this->sdl_screen, this->rect, image, width, height );
 496                                 break;
 497                         case 2:
 498                                 display_2( this->sdl_screen, this->rect, image, width, height );
 499                                 break;
 500                         case 3:
 501                                 display_3( this->sdl_screen, this->rect, image, width, height );
 502                                 break;
 503                         case 4:
 504                                 display_4( this->sdl_screen, this->rect, image, width, height );
 505                                 break;
 506                         default:
 507                                 fprintf( stderr, "Unsupported video depth %d\n", this->sdl_screen->format->BytesPerPixel );
 508                                 break;
 509                 }
 510
 511                 // Flip it into sight
 512                 SDL_Flip( this->sdl_screen );
 513         }
 514
 515         sdl_unlock_display();
 516
 517         if ( unlock != NULL ) unlock( );
 518
 519         return 1;
 520 }
 521
 522 /** Threaded wrapper for pipe.
 523 */
 524
 525 static void *consumer_thread( void *arg )
 526 {
 527         // Identify the arg
 528         consumer_sdl this = arg;
 529
 530         // Get the consumer
 531         mlt_consumer consumer = &this->parent;
 532
 533         // internal intialization
 534         mlt_frame frame = NULL;
 535
 536         // Loop until told not to
 537         while( this->running )
 538         {
 539                 // Get a frame from the attached producer
 540                 frame = mlt_consumer_rt_frame( consumer );
 541
 542                 // Ensure that we have a frame
 543                 if ( this->running && frame != NULL )
 544                 {
 545                         consumer_play_video( this, frame );
 546                         mlt_frame_close( frame );
 547                 }
 548                 else
 549                 {
 550                         if ( frame ) mlt_frame_close( frame );
 551                         this->running = 0;
 552                 }
 553         }
 554
 555         return NULL;
 556 }
 557
 558 static int consumer_get_dimensions( int *width, int *height )
 559 {
 560         int changed = 0;
 561
 562         // SDL windows manager structure
 563         SDL_SysWMinfo wm;
 564
 565         // Specify the SDL Version
 566         SDL_VERSION( &wm.version );
 567
 568         // Get the wm structure
 569         if ( SDL_GetWMInfo( &wm ) == 1 )
 570         {
 571 #ifndef __DARWIN__
 572                 // Check that we have the X11 wm
 573                 if ( wm.subsystem == SDL_SYSWM_X11 )
 574                 {
 575                         // Get the SDL window
 576                         Window window = wm.info.x11.window;
 577
 578                         // Get the display session
 579                         Display *display = wm.info.x11.display;
 580
 581                         // Get the window attributes
 582                         XWindowAttributes attr;
 583                         XGetWindowAttributes( display, window, &attr );
 584
 585                         // Determine whether window has changed
 586                         changed = *width != attr.width || *height != attr.height;
 587
 588                         // Return width and height
 589                         *width = attr.width;
 590                         *height = attr.height;
 591                 }
 592 #endif
 593         }
 594
 595         return changed;
 596 }
 597
 598 /** Callback to allow override of the close method.
 599 */
 600
 601 static void consumer_close( mlt_consumer parent )
 602 {
 603         // Get the actual object
 604         consumer_sdl this = parent->child;
 605
 606         // Stop the consumer
 607         mlt_consumer_stop( parent );
 608
 609         // Now clean up the rest
 610         mlt_consumer_close( parent );
 611
 612         // Finally clean up this
 613         free( this );
 614 }